<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>BootStrap</title>
    <link rel="stylesheet" href="../css/bootstrap.min.css">
    <script src="../js/jquery-3.3.1.min.js"></script>
    <script src="../js/bootstrap.min.js"></script>
</head>
<body>
<center>
    <button class="btn btn-info">Hello World!</button>
</center>
</body>
</html>